Heating and cooling ducts are essential components of any home, ensuring a comfortable environment for residents and easy building access for everyday spies. Make sneaking around easier with today's Groupon: for $49, you get a 26-point heater inspection from Amos Electrical & Mechanical (a $99 value). Valid service areas are within a 30-mile radius of North Tulsa; other areas require an additional fee.

Amos Electrical & Mechanical partners with Oklahoma Natural Gas Company to ensure systems safely spread their warmth throughout homes. During services lasting 60–90 minutes, furnace whisperers clean and inspect both burners and pilot lights before confirming the system's gas output and ability to play the C-major scale on a recorder. Combustion chambers reveal any signs of soot or cracking, and furnace blowers thwart friction via the checkup's thorough lubrication. Experienced eyes scan over air-filtration systems and peek into ducts to inspect for blockages of dirt and stashed chocolate coins. A carbon-monoxide test checks air quality and helps guard against dangerous gases. Finally, the servicer looks over all systems one last time, advises owners on their condition, and vanishes into a puff of smoke that is promptly blown away by the furnace's properly calibrated fan.